Desperate Measuring

You’re alone on a desert island and want to lay out a course for some snail races. Unfortunately, you have only an 8.5 x 11 inch sheet of paper. How can you use it to measure exactly 3 inches?
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Here are two ways:
- “Dog-ear” the page, folding one corner across to the opposite side. The area below the dog-eared portion measures 8.5 x 2.5. Reopen the paper and fold this 8.5 x 2.5 portion up into the page. The area that remains uncovered measures 8.5 x 6; it can be folded in half to produce a height of 3 inches.
- Fold the paper in half to make a doubled sheet measuring 5.5 x 8.5. Now “dog-ear” this doubled page, folding one corner across to the opposite side. The area below the dog-eared portion measures 5.5 x 3.
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August 6, 2012 | Puzzles